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The
Silvermine River Wetlands, Bird watching & the Leopard Toad (Bufo
Pantherinis)
The Silvermine
River Wetlands is a protected area to the north
east of Fish Hoek where the Silvermine River forms a small
fynbos marshland before it reaches False Bay. The area is
marked by excellent paths and is accessible from every direction
with a car park just off Main Road in Clovelly, Fish Hoek
The
Wetlands are popular with nature lovers who come to see
the plants, wildlife and especially the endangered Leopard
Toad. It is also popular with birdwatchers due to the range
of species that visit and make their homes in the Wetlands
(see list below).
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Western
Leopard Toad
(Bufo pantherinus)
(formerly: Bufo pardalus) |
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This large toad of up to about 140 mm in length
has a most attractive dorsal pattern of chocolate
brown patches on a bright yellow background.
It is endemic to certain low- lying coastal
areas of the south-western Cape and has a
restricted and fragmented distribution. Besides
the Cape Flats and the Cape Peninsula, the
western leopard toad occurs in the Pringle
Bay- Betty’s Bay – Kleinmond area,
and in the Stanford – Gaansbaai - Pearly
Beach area.
Although these toads are
dependent on wetland habitats such as rivers,
coastal lakes, vleis and pans, they spend
most of their time out of water, even venturing
into suburban gardens to forage. Typical breeding
sites have standing, open water, over 50cm
deep, with scattered patches of aquatic plants
and beds of emergent vegetation such as bulrushes.
Breeding usually takes place during August
but has also been recorded at the end of July
and in September. During this time adult males
and females converge on selected breeding
\sites and mating takes place, with the females
depositing thousands of eggs in the water
in long, gelatinous strings. The tadpoles
develop into tiny 11-mm-long toads, which
leaves the water in their thousands during
October, November and/or December. However,
relatively few of the offspring develop into
adults; most fall victim to a variety of predators
(including their own kind) and other hazards.
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The western leopard
toad is threatened through most of its restricted
and fragmented distribution area by development
and habitat degradation. This has resulted in it
being recently (2001) assigned to the IUCN Red List
category of “Endangered”. A particular
problem facing this species, besides habitat loss,
is that, especially during the breeding season,
adult toads migrating to breeding sites in urban
environments are forced to negotiate roads, walls,
canals and similar barriers. During this time, many
adults in prime breeding condition get killed by
road traffic, which could potentially threaten the
survival of local populations in the longer term.
Artificial water bodies with steep vertical sides,
such as canals and swimming pools, represent additional
deathtraps. Other threats at some breeding sites
include pollutants, introduced predatory fish (e.g.
water hyacinth). Fortunately, however, the species
also occurs in protected nature areas such as Zandvlei
Nature Reserve and the Cape Peninsula National Park.
The distribution and conservation
status of the Western Leopard Toad is monitored
by the Western Cape Nature Conservation Board as
part of a threatened species-monitoring programme.
This helps ensure that appropriate recommendations
can be made when and where necessary to promote
the conservation and wise management of this species
and its habitat. |
Bird
watching in the Wetlands
African Marsh Warbler
African Sedge Warbler
African Spoonbill
Black Backed Gull
Black Crowned Night Heron
Black Headed Heron
Blacksmith Plover
Bokmakerie
Brown Throated Martin
Cape Bulbul
Cape Canary
Cape Reed Warbler
Cape Shoveller
Cape Wagtail
Cape Weaver
Cattle Egret
Common Waxbill
Crowned Plover
Dabchick
Darter
Egyptian Goose
Ethiopian Snipe
European Starling
Fantailed Cisticola
Fiscal Shrike
Giant Kingfisher
Glossy Ibis
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Greater
Striped Swallow
Grey Headed Gull
Grey Heron
Hadeda
Hartlaub’s Gull
Laughing Dove
le Vaillant’s Cisticola
Lesser Double collared Sunbird
Little Egret
Malachite Kingfisher
Masked Weaver
Moorhen
Painted Snipe
Pied Avocet
Pied Crow
Pied Kingfisher
Pin Tailed Whydah
Purple Heron
Red Knobbed Coot
Red Winged Starling
Reed Cormorant
Rock Pidgeon
Sacred Ibis
Spotted Dikkops
Spotted Prinia
Swift Tern
Three Banded Plover
White Necked Raven
White Throated Swallow |
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